Loader



H. H. BARBER Sept. 1, 1931.

LOADER Se t. 1, 19311.

H. H. BARBER LOADER Filed Nov.

1927 4 Sheets-Sheet 2 fi arg Sept. 1, 1931. V H. H. BARBER 1,321,536

LOADER Filed'Nov. 11, 1927 4 Sheets-Sheet 3 45757 7752 ya'zgff 5012561.

H. H. BARBER Sept 1, 1931.

LOADER Filed Nov 11. 1927 4 Sheets-Sheet 4 l atented ept. 1,

UNITED .STATES PATENT OFFICE" HARRY H. BARBER, F AURORA, ILLINOIS,ASSIGNOR T0 BARBER-GREENE COMPANY,

A CORPORATION OF ILLINOIS LOADER Application filed November 11, 1927,Serial No. 232,564.

This invention relates to a loader and concerns itself primarily withmeans for mounting the conveyor boom thereof and controlling the same.The invention contemplates a loader which is relatively short and mobileso that the same can be used on narrow streets and places of small areaand in wh1ch the boom may be elevated to a horizontal position in arelatively low plane so that the m same may pass under viaducts,bridges, or

r the like.

The invention comprises the novel structure and,combination of partshereinafter described and more particularly pointed out and defined inthe appended claims.

In the accompanyingdrawings which 1llustrate a preferred embodiment ofthis lnvention and in which similar reference numerals refer to similarfeatures in the different views:

Figure 1 is a side elevational View of a loader embodying thisinvention, illustrating the conveyor boom in its operative posltion.

Figure 2 is another side elevational view of the loader, illustratingthe boom in its elevated horizontal position.

Figure 3 is a rear elevational loader.

iew of the 45 control. p

Figure 4: is a fragmentary part sectional movement of the radius arms 9and limit the The loader illustrated is of the type shown in the BarberPatent N 0. 1,630,598 to which reference may be had for a completeunderstanding of the machine. The present structure, however, differsfrom the structure shown in the patent and this difference residesprimarily in dispensing with the rollers and the track and supportingthe'boom upon a pair of pivoted arms. 1

In referring to the drawings, it will be noted that the loader embodiesa crawler 1 of any improved type upon which a power unit 2 is mounted.This power unit is preferably in the form of an internal combrstionengine or the like, which. both operates the crawler and the conveyor aswill later more fully appear. A suitable frame consisting of uprights 3,diagonal braces 4 and horizontal braces 5 is constructed upon thecrawler for supporting the boom 6 which 65 may be of any standardconstruction. The side members of the boom are provided with supports orplates 7 to which radius arms 9 are pivoted by means of a transverseshaft 10. The lower end of the two radius arms 9 are pivotally securedupon suitable bearfngs upon the power shaft 11 which is connected bysprocket gearing 12 to the engine shaft. Between the rear uprights 3 andthe diagonal struts 4 there is a supporting brace member 13. A smallangle .bar 14 is secured upon each side of the frame to the forwardupright 3 and the bracing plate 13. This angle bar l l'is provided withsubstantial upright terminals 15 from which lateral stop members 16extend in an outward direction as shownmore clearly in F igure 4. Thesestops 16 lie in the path of movement therebetween.

Upon each forward upright 3 there is a plate member 17 and betweentheseplate ,members there extends a shaft 18 which is shown more clearlyin Figure 5 and this shaft 18 supports a pair of rollers 19 which lie inthe plane of the side angles 20 of the boom. It w1ll be noted that theserollers are situated just behind the plates 7 which act as a guidetherefor. With reference to Figure 5, it will be noted that in itsoperative position the boom is not supported upon the rollers 19. Thepurpose of these rollers is to assist in tilting the conveyor boom aswill be later more clearly shown.

Between the frame of the conveyor and the front end of the boom are apair of thrust arms 21. The ends of each thrust arm are respectivelypivoted to the frame and to the front end of the boom. The function ofthese thrust arms is to keep the nose of the boom at its work and toallow the same to elevate if an obstruction is encountered.

Each thrust arm is in sectional form. One section of the channel bar 22which is pivotally connected at its outer end to the boom and the secondchannel section 23 which is pivotally connected to the crawler frame asindicated at 24. Each channel section is provided with a series ofapertures 25 and two channel members are in opposed relation as shown inFigure 7. Between the channel members there is a solid bar 26 which isprovided with a suitable slot 27. The two opposed channel sections areconnected together by bolts 28 which may be inserted through any of theapertures 25. Each thrust arm is accordingly both adjustable andextensible for a purpose which will later more fully appear.

The boom is adapted to be elevated from the ground and tilted to itshorizontal position by means of a cable 29 which is attached to the boomat a point 30 above the radius arms. The cable then passes around apulley 31 which is mounted upon the crawler frame and then around apulley 32 which is suitably supported on the boom, In the presentinstance the sheave of the ulley 32 is shown as connected to the plateFrom the pulley-32 the cable 29 returns to a drum 33 mounted on a shaft33a which may be operated by means of a hand wheel 34 which may begeared to the drum 33 in any well known manner. In referring to Figure 3it will be noted that the shaft 33a extends to the opposite side of themachine and that the cable control is duplicated upon such oppositeside.

In Figure 8 there isshown a sli ht modification of the controlmechanism. his modification consists in connecting the pulley 32 to theradius arms 9 instead of to the boom.

The conveyor embodies an endless bucket conveyor 35 which is driven fromthe power unit on the crawler and the driving relation is such that itwill not be affected by any change in the posltion of the boom. To thisend it will be noted that there is a driving sprocket 36 concentric withthe lower pivot of the arms 9. A sprocket chain 37 is trained over thesprocket wheel. One reach of this sprocket chain passes over an idlerpulley sproc et 39 and is trained over another sprocket wheel 40 on theboom in spaced relation with the sprocket wheel 38 and just above thesame.

The operation of the machine is as follows:

Assuming that the parts are in the position shown in Flgure 1 and it isdesired to elevate the boom to horizontal position, the operator willremove one of the bolts 26 in the thrust bars 21 whereby the same can beextended during the elevation of the boom. The operator will then turnthe hand wheel 34 in the proper direction for exerting a pull upon the.pulley 32. The first movement thereof will raise the boom from itsposition on the ground and will bring it into contact with the roller 19which will act as a sort of fulcrum.

The boom will be elevated until the arms 9" come in contact with therear stops 16. During this movement the boom will be supported by thearms 9 which will swing upon their pivots 11. The boom will receive sometilting movement while it is being moved rearwardly against the rearstops 16. When such rear stop is reached, the continued operation of thedrum on the shafts 33a will cause the cables 29 to tilt the boom tohorizontal osition as shown in Figure 2, in which posltion the boom issufficiently low to pass under viaducts, bridges, or the like.

It will be appreciated that the present loadext} is a simple and cheapconstruction which may be used especially where a light loader isdesired.

I am aware that many changes may be made, and numerous details ofconstruction may be varied through a wide range without departing fromthe principles of this invention, and I therefore do not proposelimiting the. patent granted hereon, otherwise than necessitated by theprior art.

I claim as my invention:

1. In a loader, a vehicle embodying a frame, a pair of radius rodspivoted at their lower ends to said frame, stop means for limiting theswinging movements of said rods, a boom pivotally connected adjacent itsmedial portion to the upper ends of said rods, and a pair of telescopicthrust bars connecting said frame and boom and extensible upon elevationof said boom.

2. In a loader, a crawler including a frame,-

a pair of radius. rods pivoted at their lower ends to said frame, atiltable boom pivoted adjacent its medial portion to said rods andsolely supported thereby when in horizontal position, stop means forlimiting the swingmg movements of said rods and a fulcrum roller uponsaid frame over which said boom may tilt.

3. In a loader including a crawler having a frame, a tiltable boom, apair of radius rods pivotally connected to the medial portion of saidboom, and to the lower portion of said frame for solely supporting saidboom in horizontal position, a fulcrum roller upon said frame over whichsaid boom may tilt and,

extensible thrust bars connecting said frame and the forward part ofsaid boom.

In testimony w ereof I have hereunto subscribed my name.

" HARRY H. BARBER.

